Improved punch



i UNITED STATES PATENT OFFICE.

GYRUS B. HOLDEN, OF WORCESTER, MASSACHUSETTS.

IMPROVED PUNCH.

Specification forming part of Letters Patent N 0. 57,136, dated August 14, 1866.

To all whom it may concern:

Be it known that I, GYRUs B. HOLDEN, of Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in Hand-Punches; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a side view of a hand-punch constructed according to my invention. Fig. 2 is a partial longitudinal section of the same.

Similar letters of reference indicate corresponding parts in both iigures.

This invention consists in a novel construe' tion of a hand-punch for perforating leather, card-board, sheet-metal, or other similar articles, whereby a very powerful operation of the punch is obtained, and whereby it may be operated with the same leverage and with equal facility to punch a hole at a greater or less distance from the edge of the article to be perforated.

To enable others to understand the coustruction and operation of my invention, I will proceed to describe it with reference to the drawings.

A represents a strong lever of suitable size, to which the other parts of the punch are attached, and which is provided at one end with a bow or ring, a, through which the tingers are passed in using the punch. The opposite or forward end of this lever A is divided into two parts, b and c, by a deep transverse slot, e, which extends longitudinally inward from the said end. The part b of the aforesaid forward end of this lever A has a deep longitudinal groove or recess, d, formed in its outer side, the sides of the said recess being perpendicular to the slot e.

' The lever B is pivoted at its forward end in the forward end of this groove d by means of a transverse pin or pivot, f, the rearmost end of the said lever B being curved, as shown at n in the drawings, and extending back past the bow ct of the other lever A.

Situated within the recess d, just mentioned, and covered by the forward part ofthe lever B, is a pivoted arm, C, which has upon its forward end the inwardly-projecting punch i, which passes through a suitable hole inthe bottom of the recess or groove d into the slot e, the said arm C being pivoted near its rearmost end by means of the transverse pivot g, with its rearmost end extending back from the said pivot g.

It is a iiat spring secured at one end to the inner-side of the bowu, with its other end bearing inward against the rear end of the arm C, to press the forward end thereof outward against the lever B, as will be presently further explained.

m is a tubular socket, which is screwed into the part c of the lever A opposite the punch i, and through which pass the disks cut from the article in punching or perforating the same, the internal diameter of the said socket corresponding with the diameter of the punch t'. That part of the lever B which comes in contact with the arm C forms an obtuse projection, as shown at n', in order to better secure the proper action of the said lever and arm upon each other.

The operation ofthe punch is as follows: The p curved rear end, n, of the lever B is placed in the palm of ,the hand, with the fingers passed through the bow of the other lever, A, so that the rear end of the two levers may be conveniently pressed together or toward each other. The edge of the article to be punched or perforated is passed into the slot e, with the point or place where the hole or perforation is desired to be situated between the end of the punch and the tubular socket m. The two rear ends of the levers A and B are then pressed together, ou which the lever B, acting on the arm G, forces the punch inward through the article to beperforated, and for a short distance into the tubular socket m, thus cut-ting a small disk from the said arti cle and forming a hole of corresponding size therein, the disk thus cut out passing out through the said socket on. The pressure upon the ends of the levers is then relaxed, whereupon the spring h, acting on the rearmost end of the arm C, forces the forward end thereof outward, thus at once bringing the punch away from the socket m and forcing the levers apart, so that the position of the article may be changed to punch another hole by again bringing the levers together in the manner pushed n greater or less distance into the slot m, as required, so tha-t the hole may be made at a greater or less dista-nce from the edge of the article with equal facility and power.

`What Iclaiim as new, and desire to secure by Letters Patent, is-

Tlle slotted lever A, pivoted arm C, and lever B, in combination with each other and with the punch, constructed and arranged subtanktially as and for the purpose herein set ort C. B. HOLDEN.

Witnesses J. HENRY HILL,- G. W. EsTABRooK. 

